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"U.N. Climate Chief Defends Findings After Emails"

"COPENHAGEN -- The head of the U.N.'s panel of climate scientists on Monday strongly defended findings that humans are warming the planet, after critics said that leaked emails from a British university had undermined evidence.

Rajendra Pachauri, head of the U.N.'s Intergovernmental Panel on Climate Change (IPCC), told a climate conference that its findings were "subjected to extensive and repeated reviews by experts as well as by governments."

The IPCC concluded in 2007 that it was at least 90 percent certain that humans were to blame for global warming."